Dental appliance



Dec; 11, 1922.. 1477091 H. K. VON DER HEYDT DENTAL APPLIANCE Filed Sept. 25 1922 Patented Des. 11, 1923.

umnn STATES EARBY K. VONDE3IBIEYD'JI', OF BUT'LE, MON'IANA.

DENTAL APPLIANCE,

Applieation filed September 25, 1922. Serial N0. 590,462.

T aZZ 10710 171 z'zf may covwern:

Be it known that I, HARRY K. VON DER HEYDT, a citizen of the United States 0f America, and resident of Butte, in the county ofSilver Bow a11d State 01 Montana, have invented certain new and useful Improven1ents in Den'tal Appliances, of which the following is a specification.

This invention relates t0 the art 0f dentistry und particularly t0 trays adapted 'f01 use 111 holdingg casts 01 forms having impress1ons 111 mechanical dentistry.

Heretofore, the 1IILPIGSS1QIIS for the upper jaw and the lower jaw have been tr'1mmed by band in shaping and smoothing them 130 the required dgree, and this necessitated 21 very great expenditure Of ti1ne und 121'001.

t 1s 2111 object of this inveution to produce 21 tray o1 holder pr eferably made 0f ce1111 101d into which tne soft plastic material 0r p1aster c0fllp0und is'app1ied anal wherein it is held du1ing the steps of the 111ec11anical W01k in the art 013 dentistry. v

TI; is an object 01 this invention 110 produce a tray of the character indicated which Will hold the plastic material, after which, the teeth 02111 be partially imbedded in the plastic material, anal it wi11be unnecessary to (10 az1y trimming whatsover.

It is a further object of this invention to producea top o1 tray o1: the character indicated, 01 materizil similar to celluloid, thus nmking it possible t0 handle und exhibit a model xvithout ehe neceSsity of the workrequ1red in the production of Such models, as is 110W carried on.

lt is a further object 01 this invention to produce 21 top 01 tray of the chamcter indi cated wh'1ch W111 be comparatively inexpens1ve to n1anufacture.

With t he foregoing and other objects in view, the invention consists in the details 0'E construction, and in the arrangement and combination of parts tobe hereinafter more fully set forth and claimed.

In describing the invent1on 111 detail, ref' e1ence will be had to the accompanying dmwings forming part of th1s application wherein 1ike charact'ers denote corresponding parts in the s'everal viewsand in which Figure 1 illustrates a view in perSpective Figure 6 illustrates a sectional View 011 the line 66 of Fig. 5.

In these drawings, 10 denotes 21' top Q11 tray having upstandin'g flanges forming the sides of the top 01' tray, it being sho'wxi that the fiange 11 is much higher tha11 thefla11ges 12 anc1 13 and that t11e s'1cle flanges 14 and 15 are tapered 111 height 1101n oneend flange 130 the other; and furthermore, the said. top ortray is provided with diagonally dispsed corners 17, and, as stated, this to-p 01 t1ay is prefgrably made of ce1luloid 01 some transparent material. flanges 12 and 13 stand at ar1gles to euch ocher and diagonally Wih 1espect t0 the side flanges.

Itwil1be Seen that the 1 In that form of the i nvention shown in Figures 4 to 6, the top 01' tray 18 has an end curved flange 19 ab 011e end, and except f01 the c0nfiguration 01E this flange, the construction is the same Es that of the topor tray shown in Figure l, and therefore 21 further detailed description of the same is believ8d unnecessary for an understanding 01 the inventio11 by 011e skil1ed in che art.

I claim:

In 21 denta1 apparatus, 21 top 01 trayforn.

plastic modelgpg mprising a Qnepiece structure having the charactenof celluloid; 211111 the said tray including a bottorn with pwardly extendinq fiangesform1ng' an enclosure, t'he said flanges being integral with one anothiar and the bottom and continuous around the edge 0f the bottom, the flange 21t one end of the tray being relatively higher than the flange at the other end thereof,

and the Side flanges bei-11g tapered 111 height from one end flange to the other. HARRYVK. VON DER HEYDT. 

